Configuring the Internal Baseband Source
R&S
®
SMW200A
221User Manual 1175.6632.02 ─ 16
Waveforms can be generated for example with the signal generation software
R&S WinIQSIM2 or the R&S
®
Pulse Sequencer software.
●
The instrument provides different functions to generate waveforms Internally.
– Some of the digital standards firmware options provide the possibility to store
the current signal settings into a waveform file. These waveform files can be
loaded in and processed as multi-carrier or multi-segment signal by the ARB
generator.
See also Chapter 4.7, "Using the Arbitrary Waveform Generator (ARB)",
on page 300.
– Multi-carrier waveforms consisting of carriers modulated by different baseband
signals can be configured and created internally. Such multi-carrier waveform
files are required to simulate complex multi-carrier scenarios with different
baseband signals, e.g. CDMA2000, 3GPP FDD, or signals in accordance with
the LTE-Advanced specifications.
See also Chapter 4.9, "Generating Multi-Carrier Signals", on page 354.
– Provided the instrument is equipped with the corresponding option, it is also
possible to generate multi-carrier waveforms consisting of unmodulated carri-
ers
See also Chapter 4.10, "Generating Multi-Carrier Continuous Wave Signal",
on page 372.
4.2 Standard or Wideband Baseband Generator
The R&S SMW can be equipped with a standard or with a dedicated wideband base-
band section.
●
The term standard baseband instrument describes R&S SMW equipped with at
least option Baseband Generator R&S SMW-B10 and baseband main module
(R&S SMW-B13/B13T).
●
The term wideband baseband instrument describes R&S SMW equipped with at
least option Wideband Baseband Generator R&S SMW-B9 and Wideband base-
band main module (R&S SMW-B13XT).
If fully equipped, the R&S SMW with standard baseband generates signals with up to
160 MHz bandwidth and modulates them on up to 40 GHz.
The fully equipped wideband baseband generator extends the internal RF modulation
bandwidth to 2 GHz. With this option, the R&S SMW generates wideband vector
modulated signals with up to 40 GHz carrier frequency using a single device.
Major differences between the standard and the wideband baseband generators
The R&S SMW can be equipped with a standard or with a wideband internal baseband
generator. Regarding the RF performance, both generators offer similar characteris-
tics.
The choice which baseband generator to use, depends merely on the application:
●
The standard baseband generator is the best choice in applications that require
multichannel, MIMO or MSR scenarios.
Standard or Wideband Baseband Generator
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